A grating coupler with aligned Si3N4 and Si grating teeth is proposed and demonstrated. The measured coupling efficiency is −1.3 dB (competitive with the best Si-only grating couplers), and the 1-dB bandwidth is a record 80 nm.
© 2014 Optical Society of America
You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
Login to access OSA Member Subscription
Supplementary Material (1)